Molding-machine.



B. RONGERAY.

MOLDING MACHINE.

Patented Oct. 24, 1911.

3 SHEETS-SHEET 1.

E. RONGERAY.

MOLDING MACHINE.

APPLICATION FILED MAR. 28, 1911.

1,006,681 Patented Oct. 24, 1911.

3 SHEETS-SHEET 2.

COLUMBIA I'LANOGRAPII c0., wA n.. ..|uN. n. r.

E. RONCERAY.

MOLDING MACHINE.

APPLICATION FILED MAR. 28, 1911.

1,006,681. Patented 0 31.24,1911.

3 SHEETS-SHEET 3.

JOLUMIKIA PLANUGRAIII \IUUWASHINUTON. h.-

UNITED STATES PATENT. OFFICE.

EUGENE RONCERAY, OF PARIS, FRANCE, ASSIGNOR TO SOCIETE ANONYME DES E'IAB- LISSEMENTS PH. BONVILLAIN AND E. RONCERAY, OF PARIS, FRANCE, A CORPO- RATION 0F FRANCE.

MOLDING MACI-IINE.

Specification of Letters Patent.

Patented Oct. 24, 1911.

To all whom it may concern:

Be it known that I, EUGENE RoNonnAY, a citizen of the Republic of France, and a resident of Paris, France, have invented certain new and useful Improvements in Molding- Machines, of which the following is a specification.

The invention relates to molding machines, and has for its primary objects; the provision of a machine in which a plurality of operations incident to the formation of a plurality of molds may be simultaneously carried on; the provision of a molding machine which can be operated at a minimum cost and with great economy of time; the provision of a machine which can be operated conveniently and rapidly and with the greatest of accuracy.

One embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a front elevation of the machine, Fig. 2 is a side elevation partially in section, Fig. 3 is a plan view, and Fig. 4: is a plan view of the pattern plate, and Figs. 5 and 6 are transverse and longitudinal sec tions respectively through the molding table.

The apparatus as shown, briefly stated, comprises a pair of heads provided with opposing ramming plungers, arranged symmetrically opposite each other in such manner that the position of the heads may be reversed by moving them about the horizontal axis upon which the apparatus is mounted. The pattern drawing may be effected either by raising the mold box which has been compressed without turning over the machine, or by turning the machine over and then lowering the molding box on the piston which compressed it, the two means of drawing however being combined if desired to suit individual cases.

Referring to the drawings, and particularly to Fig. 2, it will be noted that the molding press comprises a fixed standard 10 terminating at its upper portion in a socket or sleeve 11 in which the horizontal pivot spindle 12 of the machine can rotate with a slight amount of friction. To one of the ends of the spindle 12 is secured a hollow column 13 comprising two symmetrical cylindrical arms on each of which a socket or sleeve 15 cast integral with one of the heads A or B of the machine can rotate freely on ball bearings 1%. Each socket 15 is held against longitudinal movement by a collar 16 screwed on the threaded end of the hollow column 13, and rests on one of the ends of the sleeve 15 on ball bearings 17 as shown in Fig. 2. The molding table 18 is positioned in substantial alinement with the axis of the spindle 12, and is secured to the column 18 by means of the brackets 18 (Fig. 3), and at each side of the said table is mounted, either directly or by means of braces 19, one of the pattern plates 20, each corresponding to one of the two parts of the mold. The molding boxes or flasks 21 are placed on each side of the said pattern plates 'with interposed stripping plates 22, if the molding requires them. The two heads A and B of the machine and the parts carried thereby, are the same, so that a description i of one will be sufficient. Each of the heads A and B forms a hydraulic cylinder in which is placed a compression piston 23 carrying on its lower end a plate or disk 24E provided laterally with a rod 25 parallel to the axis of the piston and passing through a hole in the head where it can slide so as to move with the plates 24: and the piston 23 while preventing such elements from turning. Each cylinder is closed at its upper end by a cover 26, and the upper face of the piston 23 can be placed in communication with a water supply under pressure by means of a pipe 27 by manipulating a controller or valve 28 of suitable construction.

As shown in Fig. 2 the cylinder and the piston have two different diameters so as leave between the said elements an annular space 29 permanently in communication with the conduit of water under pressure by means of the pipe 30, so that when the pressure does not act on the large face of the piston, such piston is held in retracted position. Another pipe 31 provides communication between the cylinder and a discharge pipe, the discharge being also controlled by the valve 28. The pipes 27, 30 and 31 terminate in the member 32, which member can rotate in the interior of the corresponding end of the column 13 to correspond with the rotation of the heads about such column. A stufiing box 33 is provided to secure a tight joint. At the outer end of the spindle 23 is a gland 35 for providing a tight joint for the supply member 34. Water is supplied to the member 34 by means of the pipe 36, and this water is conducted to the spindle by means of the horizontal pipe 37 communicating at its inner end with the vertical pipe 39, a connecting T 38 being provided to connect the two pipes. The discharge conduit 40 also terminates in the member 34, but opens into a recess of the latter provided around the pipe 37 and communicating with the interior of the spindle 12. Each of the pipes 31 also terminates in one of the members 32, which member 32 opens into the recess about the pipe 39, so that communication is established between the interior of the column 13 and the interior of the spindle 12. The arrangement of piping will be clear on comparison of the upper and lower portions of Fig. 2, the piping for the two heads being precisely the same. The controlling valve 28 may be of any approved form.

The driving mechanism for the spindle 12 consists of two vertical hydraulic cylinders 41 of different diameters secured to the standard 10 and closed only at their upper ends. Each cylinder contains a piston 42, the rod 43 of which passes through the cover, and is packed by means of a flanged leather member 44. A gear wheel 46 is secured to the spindle 12, and the chain passing over this gear is connected to the two piston rods 43. Secured to the upper end of each cylinder is a conduit 47 for supplying water under pressure, one cylinder being always under pressure, and by means of a suitable distributer which can be operated from the front of the machine by a hand lever or a pedal, water under pressure can be sent into the other cylinder 41 for rotating the spindle 12 in one direction, the opposite movement being obtained by placing the cylinder in question in the exhaust condition. A conical spring 48 wound in the shape of a spiral is arranged above each piston 42 and around its rod 43 for deadening the shock each time that the machine is turned through half a revolution and reaches the vertical position.

In the interior of each piston 23 is arranged a nut 49 provided with lateral recesses engaged with rectangular guides 50 which enable it to move in the direction of the axis of the piston, but prevent it from rotating. This nut is mounted on a screw 51 provided with a collar 52 placed under the cover 26, while the shoulder 53 of the said screw rests against an annular shoulder of the cover, so that the screw is held against longitudinal movement. A stufl'ing box 54 is provided about the screw 51, the upper end of the screw being provided with a square portion on which is mounted a spanner 56 by means of which it can be turned.

In order to prevent this spanner from falling off when the machine is reversed, the holding screw 57 is provided.

In order to maintain the machine vertically in one of its operative positions, the

holding rod 58 '(Fig. 3) is provided. This holding rod passes through the table 18, and its inner end engages holes drilled in the face of the supporting base or frame 10, the rod being normally held inward by means of the spring 62. The rod may be moved outwardly by means of the lever 60 pivoted to the outer end of the rod and provided with the handle 61. As indicated in Figs. 1 and 2 two pairs of hooks 63 are provided, which hooks are pivoted at their outer ends sto the heads A and B, and engage at their inner ends the projections 64 carried by the table 18. The strain upon the machine is thus materially reduced and the parts are I securely held in parallelism.

In order to operate the machine, the two pattern plates 20 are placed in position upon the table 18, and the machine being in a vertical position, a molding box or flask 21 is put in place on the upper pattern plate 20, a sand frame is put on and the frame and flask filled with sand. The supporting hooks 63 are then brought into engagement under the projections 64, and by operating the valve 28, water under pressure is sent into the upper cylinder through the pipe 27, the piston 23 descending with the ramming plate 24 and compressing the sand. The

downward movement of the piston is 3 stopped when the upper shoulder of the piston meets the nut 49 which has been previously adjusted by means of the screw 51 and spanner 56. The holding rod 58 is then retracted by means of the lever 60, and the machine is swung through 180 degrees, the

pressure upon the sand in the flask being maintained during such operation. The cyl- 1 inder, which is now at the bottom is connect- .ed w1th the exhaust pipe by manipulating the valve 28, thus bringing the cylinder into communication with the pipe 31, and the weight of the piston 23 and of the mold 21 I assisted by the pressure on the annular shoulder of the piston, lowers such piston and the pattern drawing takes place. The stripping plate 22, if such plate is used, also descends by gravity, its downward movement being limited by nuts 66 screwed on rods 65 passing through the pattern plate, and secured to the stripping plates at one end. The other pattern plate 20 is now in position at the top and the cycle of operation as just described can be repeated indefinitely.

When it is desired to make only a slight adjustment of the screw 51, the spanner is used in the position as indicated in full lines, but if several turns of the spanner are necessary, it must be reversed to the position indicated in dotted lines, the screw 57 being removed to permit of the reversal.

When it is desired to make only flat articles without any portions difficult to mold, the spanner 56 are not used during the mold mg, and consequently for the manufacture of standard parts the spanner as well as the mechanism controlled by it are not needed, care being taken to manipulate the controlling valve 28 to suit the conditions. But in other cases it is sometimes necessary to use this stop member 49 due to the fact that there is a tendency in the machine to spring or give in the direction indicated by the arrow F, and to the fact that there is ordinarily a slight amount of play in the machine. Under these conditions and after pressure has been applied, the molder relieves the pressure, and by operating the spanner 56 a slight amount moves the stop member 49 upward a slight amount, thus carrying the piston and plate 24 upward. Pressure is then again applied behind the piston, which just brings the plate 24 into contact with the compressed sand. The spanner can be used to advantage in all cases where the tension of the parts of the machine could produce any breaking of angular portions of the mold when the pattern drawing is started.

Among the advantages incident to the structure are the following; (1) because of the pressure kept on the mold during the swinging motion, locking of the flask on the pattern plate is unnecessary, and as a result, time is saved and the operation simplified over that of the ordinary turn-over-machine in which it is necessary to lock and unlock each flask; (2) the construction permits the use of stripping plates and the drawing of high patterns; (3) as the drawing is eifected by the same piston which rams the mold, a saving of water and time results; (4:) the machine permits of great accuracy and facility in pattern drawing because of the parallelism of the drawing-out-plate and the rear face of the flask, and (5) the construction allows a free access on three sides.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is the following 1. In a molding machine mounted for inversion about a horizontal axis, a pair of opposing ramming members, a fixed pattern support intermediate the members, a pair of port lying substantially upon the horizontal axis, opposing patterns carried by the pattern support, and power means for operating the ramming plungers.

3. In combination in a molding machine, a cylinder provided with a head, a hollow plunger in the head, and an adjustable stop for limiting the downward movement of the plunger extending inside thereof and carried by the head and extending therethrough.

4. In combination in a molding machine, a cylinder provided with a head, a hollow plunger in the head, a screw swiveled in the head and extending into the hollow plunger, and a stop for limiting the downward movement of the plunger threaded on the said screw and held against rotation by the said plunger.

5. In combination in a molding machine, a supporting frame, a turn-over member having a horizontal hollow axis, a hollow upright axis communicating therewith and carrying a head rotatable in a horizontal plane and provided with a ramming cylinder, a pipe connected to the cylinder extending through the horizontal and upright axes concentric therewith and provided with joints whereby the head may be swung laterally and the turn-over member rotated about its horizontal axis, and a connection from the ramming cylinder to the hollow upright axis whereby such axis and the hori zontal axis constitute a conduit.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

EUGENE RONCERAY.

Witnesses:

H. O. Coxn, J ULIES EAVERNE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

